function [R, l, c, N] = matrice_R_G2(J,a) 
close all;
figure, imshow(J);

ed = @edginess;
cons = @byaverage;
n = @norme;
gradient = @grad;

J = imread(J);
R = [];
% On decompose l'image en couleur dans les trois directions
    RGB1 = J(:,:,1);
    RGB2 = J(:,:,2);
    RGB3 = J(:,:,3);
    N(:,:,1) = im2double(RGB1);
    N(:,:,2) = im2double(RGB2);
    N(:,:,3) = im2double(RGB3);
% Petites transformations pour affiner au besoin
for e = 1:3
    if a == 1
        N(:,:,e) = wiener2(N(:,:,e),[3 3]);
    elseif a == 2
        N(:,:,e) = histeq(N(:,:,e));
    end
end
[l,c] = size(N(:,:,1));
R = zeros(l-1,c-1,3);
% Et on calcule les valeurs importantes
for r = 1:3
    N_inter = N(:,:,r);
    for i = 1:l-1
        for j = 1:c-1
            e(i,j) = feval( ed, N_inter, i, j);
            d(i,j) = feval( cons, N_inter, i, j);
            %g(i,j) = feval( gradient, N_inter, i, j, 1);
            %D(i,j,1,e) = d(i,j);
            R_inter(i,j)= e(i,j)*d(i,j);
            %G(i,j,1,e) = e(i,j)*d(i,j)*g(i,j);
        end     
    end
    R(:,:,r) = R_inter;
end